The host materials containing carbazole and oxadiazole fragment for red triplet emitter in organic light-emitting diodes

Guan, Min; Chen, Zhuqi; Bian, Zuqiang; Liu, Zhiwei; Gong, Zeliang; Baik, Woonphil; Lee, Hyun-Joo; Huang, Chunhui

doi:10.1016/j.orgel.2006.04.006

Cited by 47 publications

(16 citation statements)

References 15 publications

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“…[ 182 , 183 ] Huang and his co-workers combined the HT moiety of carbazole and the ET moiety of oxadiazole into molecules to synthesize bipolar materials of 9-{4-[5-(4-tert -butylphenyl)- [1,3,4] oxadiazol-2-yl]-benzyl}-9H-carbazole ( t -CmOxa), 9-[4-5-phenyl-[1,3,4]oxadiazol-2-yl-benzyl]-9H-carbazole ( p -CmOxa) and 9-[4-5-biphenyl- [1,3,4] oxadiazol-2-yl-benzyl]-9H-carbazole ( d -CmOxa). [ 182 ] Red devices were fabricated based on such molecules as the host for the red phosphor. Higher quantum effi ciency indicated that improved …”

Section: Cu (I) Complexesmentioning

confidence: 99%

Recent Progresses on Materials for Electrophosphorescent Organic Light‐Emitting Devices

et al. 2010

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Although organic light-emitting devices have been commercialized as flat panel displays since 1997, only singlet excitons were emitted. Full use of singlet and triplet excitons, electrophosphorescence, has attracted increasing attentions after the premier work made by Forrest, Thompson, and co-workers. In fact, red electrophosphorescent dye has already been used in sub-display of commercial mobile phones since 2003. Highly efficient green phosphorescent dye is now undergoing of commercialization. Very recently, blue phosphorescence approaching the theoretical efficiency has also been achieved, which may overcome the final obstacle against the commercialization of full color display and white light sources from phosphorescent materials. Combining light out-coupling structures with highly efficient phosphors (shown in the table-of-contents image), white emission with an efficiency matching that of fluorescent tubes (90 lm/W) has now been realized. It is possible to tune the color to the true white region by changing to a deep blue emitter and corresponding wide gap host and transporting material for the blue phosphor. In this article, recent progresses in red, green, blue, and white electrophosphorescent materials for OLEDs are reviewed, with special emphasis on blue electrophosphorescent materials.

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Section: Cu (I) Complexesmentioning

confidence: 99%

Recent Progresses on Materials for Electrophosphorescent Organic Light‐Emitting Devices

et al. 2010

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“…Devices containing o-CzOXD (38) as the host show maximum efficiencies of 20.2% (77.9 cd/A) for green from Ir(ppy) 3 (3) and 18.5% (13.6 cd/A) for deep red based on (piq) 2 Ir(acac) (6). Another carbazole and oxadiazole hybrid material 9-{4-[5-(4-tert-butylphenyl)- [1,3,4] oxadiazol-2-yl]-benzyl}-9H-carbazole (t-CmOxa (40)) with a large singlet energy gap of about 3.5 eV was synthesized as the host for red phosphor [88]. The device based on t-CmOxa (42) and bis (dibenzo [f,h] quinoxalinato) (acetylacetonato) Ir(III) exhibits efficiencies of 9.5% and 9.9 lm/W.…”

Section: Bipolar Hostsmentioning

confidence: 99%

Molecular hosts for triplet emitters in organic light-emitting diodes and the corresponding working principle

Gao

Liao

et al. 2010

Sci. China Chem.

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This paper summarizes the mechanism and routes for excitation of triplet emitters in dopant emission based phosphorescent organic light-emitting diodes (PhOLEDs), providing a comprehensive overview of recent progress in molecular hosts for triplet emitters in PhOLEDs. Particularly, based on the nature of different hosts, e.g., hole transporting, electron transporting or bipolar materials, in which the dopant emitters can be hosted to generate phosphorescence, the respective device performances are summarized and compared. Highlights are given to the relationships among the molecular structure, thermal stability, triplet energy, carrier mobility, molecular orbital energy level and their corresponding device performances. phosphorescent organic light-emitting diodes (OLEDs), working principle, electrophosphorescence, hosts, triplet emitter

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“…Typically, the dyes have a donor-acceptor structure that controls their photophysical properties [ 2 , 7 , 8 ]. Carbazole is an organic compound that is well known for its electron-donor properties [ 9 ]; OLEDs have used carbazole based dimers, oligomers, and polymers as blue, white, green, and red emitters [ 10 , 11 , 12 , 13 , 14 ]. Carbazole polymers are also used in the hole transport layer [ 15 , 16 ] of organic field effect transistors [ 17 , 18 ] and photovoltaic cells [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Photophysical Properties of Pyridine-Carbazole Acrylonitrile Derivatives

et al. 2011

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The host materials containing carbazole and oxadiazole fragment for red triplet emitter in organic light-emitting diodes

Cited by 47 publications

References 15 publications

Recent Progresses on Materials for Electrophosphorescent Organic Light‐Emitting Devices

Recent Progresses on Materials for Electrophosphorescent Organic Light‐Emitting Devices

Molecular hosts for triplet emitters in organic light-emitting diodes and the corresponding working principle

Synthesis, Characterization and Photophysical Properties of Pyridine-Carbazole Acrylonitrile Derivatives

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